[OpenSIPS-Users] RTP Proxy and Re-Invites

[Jeff Pyle]

Ali,

This is what I use within loose_route() to handle rtpproxy.  In my
particular case I'm bridging between two interfaces.


if (has_body("application/sdp"))  {
         # Begin rtp session update gyrations
         if (method == "INVITE") {
                 # INVITE w/ SDP, so early neg
                 # This is offer, reply is answer
                 rtpproxy_offer("frocl");
                 t_on_reply("1");
         } else if (method == "ACK") {
                 # ACK w/ SDP, so late neg (done now)
                 # This is answer
                 rtpproxy_answer("frocl");
         }
 } else {
         if (method == "INVITE") {
                 # INVITE w/o SDP, so late neg
                 # This is nothing, reply is offer, ACK is answer (~5 lines
up)
                 t_on_reply("2");
         } else {
                 t_on_reply("1");
         }
 }



And then:


onreply_route[1] {      # Manage content as necessary - early negotiation
        if (has_body("application/sdp")) {
                if ($DLG_status) {      # Update
                        rtpproxy_answer("frocl");
                } else {                # New
                        rtpproxy_answer("froc");
                }
        }
}


onreply_route[2] {      # Manage content as necessary - late negotiation -
update
        if (has_body("application/sdp")) {
                rtpproxy_offer("frocl");
        }
}




This does not handle rejected reinvites.  I don't know how to solve that
one.  Otherwise, it works well, although in some spots it may be overkill.


- Jeff



On Thu, Nov 13, 2014 at 5:13 PM, Ali Pey <alipey at gmail.com> wrote:

> Hello,
>
> What's the best way of handling rtpproxy with re-invites?
>
> Should I do unforce and then offer/answer? What if the re-invite gets
> rejected?
>
> Any help appreciated.
>
> Thanks,
> Ali Pey
>
>
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